Assessment of Heavy Metal Pollution in the Sediment of the Main Tributaries of Dongting Lake, China
AbstractHeavy metal pollution in sediment is one of the most serious problems in water bodies, including rivers, which can cause secondary pollution when environmental conditions change. In this study, surface sediment samples collected from the four main tributaries of Dongting Lake (i.e., Xiangjiang River (XR), Zishui River (ZR), Yuanjiang River (YR), and Lishui River (LR)) were analyzed for concentrations of Zn, Cr, Cu, As, Cd, and Pb. The spatial distribution, source, and potential ecological risk of these metals were determined. The results suggest a great spatial heterogeneity of heavy metals in the sediment of the studied rivers. Heavy metals had highest concentrations in the sediment of XR, especially midstream and downstream. A principal component analysis (PCA) and correlation analysis indicated that Cd and As were mainly from industrial wastewater and mineral mining, Cr came from natural process and agricultural activities, and Zn and Cu potentially from both. Pb was originated from atmospheric deposition and river inflow transportation. According to the geo-accumulation index (
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Xu, J.; Chen, Y.; Zheng, L.; Liu, B.; Liu, J.; Wang, X. Assessment of Heavy Metal Pollution in the Sediment of the Main Tributaries of Dongting Lake, China. Water 2018, 10, 1060.
Xu J, Chen Y, Zheng L, Liu B, Liu J, Wang X. Assessment of Heavy Metal Pollution in the Sediment of the Main Tributaries of Dongting Lake, China. Water. 2018; 10(8):1060.Chicago/Turabian Style
Xu, Jinying; Chen, Yuwei; Zheng, Lilin; Liu, Baogui; Liu, Jinfu; Wang, Xiaolong. 2018. "Assessment of Heavy Metal Pollution in the Sediment of the Main Tributaries of Dongting Lake, China." Water 10, no. 8: 1060.
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